Thanks Daniel, Charles and Julien.
I confirm we're not getting the error log "running job failed".
The behavior is always the same, any of the two failover instances would
run without issues for a day or two and then suddenly start consuming all
available memory in the span of an hour or less.
Please check these graphs with some examples for more details:
https://www.dropbox.com/sh/tu0jxi1vlbq81m8/AABhfz9rDumdCu3l0ROH7Lkla?dl=0
I'll try Daniel's patch and confirm results soon.
Rogelio